December is the twelfth and final month of the year in the Gregorian calendar. It is a gift. The following events took place in the month of December:
- 1937 — Minoru Hirano (Japanese voice of John Keller) is born.
- 1955 — Cyrielle Clair (French voice of Terratronus) is born.
- 1957 — Actor Deep Roy (Egyptian guard in Revenge of the Fallen) is born.
- 1963 — Fabrizio Mazzotta (Italian voice of Cybertron Jolt and Scalpel) is born.
- 1969 — Alfonso Soto (Latin-American Spanish voice of Superion Maximus) is born.
- 1982 — Japanese channel TV Aichi is founded.
- 1982 — Jonny Cruz (voice of Hoagie) is born.
- 1983 — Michelle Rodríguez (Mexican voice of Arcee in Rise of the Beasts) is born.
- 1984 — The Transformers episode "Countdown to Extinction" premieres in the US.
- 1988 — Kim Shin-woo (Korean voice of Slipstream) is born.
- 1990 — Vinícius Barros (Brazilian voice of Shamble) is born.
- 1991 — Olena Svitlytska (Ukranian voice of Airachnid) is born.
- 1998 — The Beast Wars Special OP/ED singles "SPACE DREAMER ~Haruka naru Beast Wars~"/"MY SHOOTING STAR" and "Hajimari no Uta"/"Hateshinai kono (SORA) e" are released in Japan by Columbia Music Entertainment.
- 1999 — The Beast Wars Metals episode "I'm a Crab!" airs in Japan.
- 2000 — Sophia Flörsch (German voice of Arcee in Rise of the Beasts) is born.
- 2003 — Armada - Vol:14 is released on DVD in Australia by Warner Music Video.
- 2003 — Transformers: Armada premieres in Germany with the episode "First Encounter".
- 2004 — War Within: The Age of Wrath #3 is released in the US by Dreamwave Productions.
- 2004 — G.I. Joe vs. the Transformers II Issue 4 is released in the US by Devil's Due Press.
- 2008 — Transformers: Robots in Disguise — The Ultimate Collection is released on DVD in the UK by Maximum Entertainment.
- 2009 — The Transformers Animated episode "Human Error, Part II" premieres in Latin America.
- 2010 — The Prime episode "Darkness Rising, Part 3" premieres in the US.
- 2010 — The Transformers: Ironhide TPB, and the second printings of the AllSpark Almanac, AllSpark Almanac II and Best of Optimus Prime (reissue) are released outside the US by IDW Publishing.
- 2011 — The Prime toyline is released in the US.
- 2011 — "Transformers 2010 — Volume 01: Stagione Tre Parte Prima", "Transformers 2010 — Volume 02: Stagione Tre Parte Seconda" and "Transformers 2010 — Volume 03: Stagione Tre Parte Terza" are released in Italy by Dynit.
- 2012 — The Super Robot Lifeform Transformers: Prime episode "Mission Transformation! Fowler's Investigation Files" premieres in Japan.
- 2013 — Predacons Rising, a TV movie concluding Transformers: Prime premieres in Spain.
- 2014 — Transformers Prime — Season 2 Vol. 2: Nemesis Prime / Season 2 Vol. 3: Toxicity - Collector's Box are released to home media in the United Kingdom by Primal Screen.
- 2016 — The Robots in Disguise episodes "History Lessons", "Strongarm's Big Score" and "Pretzel Logic" premiere in France.
- 2018 — The Cyberverse episode "Siloed" airs on Cartoon Network.
- 2018 — The Cyberverse episode "Matrix of Leadership" premieres in Italy.
- 2021 — Shattered Glass #4 is released by IDW Publishing.
- 2022 — Paramount+ launches in France.
- 2022 — The official teaser trailer of Transformers: Rise of the Beasts is released.
- 2022 — The Transformers: EarthSpark episode "House Rules" premieres on Nickelodeon in France, Germany, Hungary, and Indonesia.
- 2024 — G.I. Joe: A Real American Hero Compendium Volume 4 HC is released by Image Comics and Skybound Entertainment.
- 2024 — The Transformers: EarthSpark episode "Attack of the Drive-In Movie" premieres in Germany.
- 1928 — Domício Costa (Brazilian voice of Megatron) is born.
- 1934 — Alvaro Tarcicio (Mexican voice of Tigatron, Tigerhawk, Snowstalker and Cicadacon) is born.
- 1949 — Writer Douglas Booth is born.
- 1952 — Keith Szarabajka (voices of Ironhide in War for Cybertron, and Laserbeak in Dark of the Moon) is born. And he wants to know one thing: is your daddy home?
- 1959 — Kari Tamminen (Finish voice of Starscream, Ultra Magnus, Captain Fanzone and the Angry Archer) is born.
- 1960 — Jacek Mikołajczak (Polish voice of Optimus Prime) is born.
- 1963 — José Escobosa (Castilian Spanish voice of Megatron in Transformers: War for Cybertron Trilogy) is born.
- 1965 — Luis Miguel Perez (Latin American voice of Optimus Prime, Prowl and Soundwave) is born.
- 1969 — Peggy Sander (German voice of Zizza and Amber) is born.
- 1970 — Joshua Seth (voice of Carl in the 2001 Robots in Disguise cartoon) is born.
- 1972 — Actor / stuntman Dustin Dennard (Lennox Lieutenant in Transformers: Dark of the Moon) is born.
- 1974 — Armin Schlagwein (German voice of Slicedice and War for Cybertron Trilogy Mirage) is born.
- 1990 — The Super-God Masterforce episode "Battle in the Desert" premieres in Malaysia.
- 1998 — The Beast Wars II episode "Emissary of the Fourth Planet" premieres in Japan.
- 2000 — The Beast Machines episode "The Reformatting" premieres in Germany
- 2003 — The Transformers: Armada episode "Metamorphosis" premieres in Germany.
- 2009 — Best of UK: Prey #5 is released outside the US by IDW Publishing.
- 2010 — The Prime episode "Darkness Rising, Part 4" premieres in the U.S.
- 2010 — Fritz von Hardenberg (German voice of Generation 1 Ultra Magnus and others) dies.
- 2010 — The Transformers: Ironhide TPB, and the second printings of the AllSpark Almanac, AllSpark Almanac II, and Best of Optimus Prime (reissue) are released in the US by IDW Publishing.
- 2011 — The Transformers: Prime episode "Speed Metal" premieres in Germany.
- 2013 — The final day to enter the Edion and Bic Camera stores' "Arcee ~Blue Plated Ver~" contest.
- 2015 — Q-Transformers season 2 is released on DVD and Q-Transformers Original Soundtrack is released on CD in Japan.
- 2015 — The Transformers vol.2 #48 and the 5-volume box sets for both The Transformers vol.2 and More than Meets the Eye are released by IDW Publishing.
- 2015 — Rescue Bots: "Rise of the Heroes" is released on DVD by Beyond Home Entertainment in Australia.
- 2017 — TakaraTomy releases LGEX God Ginrai (w/ Godbomber, Minerva, and Cab).
- 2018 — The Cyberverse episodes "King of the Dinosaurs" and "The Extinction Event" premieres in France.
- 2019 — Francette Vernillat (European French voice of Daniel in a pair of episodes of The Transformers) passes away.
- 2022 — The Transformers: EarthSpark episode "Classified" premieres in France, Germany Hungary, and Indonesia.
- 2023 —The Transformers: EarthSpark episode "Home, Part 1" premieres in Mandarin Chinese.
- 2024 — EarthSpark's third season premieres on Paramount+ in Latin-America.
- 1947 — Robert J. Walsh (musical composer for the original The Transformers cartoon) is born.
- 1954 — Tony Todd (voice of The Fallen, and Prime Dreadwing) is born, after his mother chants his name three times into a mirror.
- 1954 — The first Burger King restaurant opens in Miami, Florida, likely thanks to the Cybertronian technology of King.
- 1961 — Chafūrin (Japanese voice of Cicadacon, General Bryce, Octopunch and War for Cybertron Trilogy Shockwave) is born.
- 1962 — Julie Lemieux (voice of Lady Macaron, Jacqueline, Anty Farmwell and Dr. Flaskenstein) is born.
- 1984 — The Transformers #4: "The Last Stand" is released in the U.S. by Marvel Comics.
- 1985 — Artist Matt Frank is born in San Antonio.
- 1987 — The Headmasters episode "Daniel Faces His Biggest Crisis Ever!!" premieres in Japan.
- 1999 — The Beast Machines episode "The Key" premieres in the US.
- 2002 — The Transformers: Generation One Vol. 1: Prime Directive TPB is released in the US by Dreamwave Productions.
- 2003 — The Armada episode "Comrade" premieres in Germany.
- 2004 — The Beast Wars Returns episode "Mission from the Stars" premiers in Japan.
- 2007 — Transformers Visualworks is released in Japan by Million Publishing.
- 2008 — The Arrival #5 and Best of UK: Time Wars #5 are released in the US by IDW Publishing.
- 2010 — The Animated episode "Chase the Spaceship" premieres in Japan.
- 2011 — The Transformers: Prime episode "T.M.I." premieres in Italy.
- 2013 — The Transformers: Robots in Disguise Volume 5 TPB and More than Meets the Eye #24 (Dark Cybertron Chapter 4) are released by IDW Publishing.
- 2013 — Transformers Cloud: Spacetime World: Guardians of Time Chapter 1: Part 2 is first published.
- 2014 — Transformers Prime — Collector's Box is released to home media in Italy by Primal Screen.
- 2014 — The Rescue Bots episode "Rise of the Heroes" premieres in Hungary.
- 2016 — The Robots in Disguise episode "Mighty Big Trouble" premieres in Japan.
- 2018 — 10 All Access is launched in Australia.
- 2018 — The Cyberverse episodes "Shadowstriker" in Brazil.
- 2019 — Legacy: The Art of Transformers Packaging (softcover reprint) is released by IDW Publishing.
- 2019 — Claudio Rodríguez (Castilian Spanish voice of Beast Wars Megatron) dies at age 85.
- 2019 — The CBS Corporation's re-merger with Viacom closes becoming ViacomCBS, later renamed Paramount Global.
- 2023 — Transformers: EarthSpark begins distrubition in Japan on numerous streaming platforms including DMM TV, d Anime Store, Bandai Channel, Google Play and Amazon Prime Video.
- 2024 — TakaraTomy officially reveals the Missing Link C-05 Sunstreaker and C-06 Cordon and preorders go up for them.
- 2025 — Robosen officially reveals their Soundwave Auto-Converting Robot.
- 2025 — Hasbro officially reveals the Age of the Primes Combaticon Swindle.
- 2025 — Roger Lumont (French voice of Bumblebee in The Transformers: The Movie) dies at age 91.
- 1951 — Mario Sauret (Mexican voice of Optimus Primal and Dark Scream) is born.
- 1954 — Hideaki Tezuka (Japanese voice of Age of Extinction Crosshairs) is born.
- 1955 — Germano Basile (Italian voice of Bumblebee, Slingshot and Springer in the G1 redubs) is born.
- 1957 — Javier Rodríguez (Chilean voice of Ratchet) is born.
- 1957 — Pino Pirovano (Italian voice of Shadelock, Ragebyte, Righty and Thundercracker) is born.
- 1965 — Dietmar Wunder (German voice of Dynasty of Primes) is born.
- 1978 — Shinya Takahashi (Japanese voice of Jon Schloder) is born.
- 1980 — Shizuka Itō (Japanese voice of Prime Arcee) is born...."ara" "ara".
- 1986 — Transformers: Mystery of Convoy is released for the Famicom in Japan.
- 1986 — The Fight! Super Robot Lifeform Transformers 2010 episode "The Secrets of the Matrix" airs in Japan.
- 1989 — The Victory episode "The Wrath of the Resurrected Giant Fortress!" premieres in Japan.
- 1997 — Beast Wars: Transformers is released for the Sony PlayStation in the US.
- 2003 — The Legends of the Microns episode "覚醒 (ゆにくろん) - alliance" premieres in Japan.
- 2003 — The Armada episode "Soldier" premieres in Germany.
- 2003 — The Armada episode "Portent" premieres in the US.
- 2004 — The Beast Wars Returns episode "The Innards of the Machine" premiers in Japan.
- 2006 — The 35th show in the Kiss Players radio drama series airs in Japan on the "Transformers Kiss Play: Transformers News Center" program.
- 2007 — The The Transformers: The Premiere Collection volume 1 HC is released by IDW Publishing.
- 2008 — The prose story "Dungeons & Dinobots" is released on the members-only portion of the Fun Publications Transformers Collectors' Club website.
- 2011 — The Transformers: Prime episode Darkness Rising, Part 1 premieres in Poland.
- 2012 — The Transformers: Regeneration One #86 is released by IDW Publishing.
- 2016 — The first full trailer for Transformers: The Last Knight is released.
- 2017 — The Titans Return episode "At the Last Second" premieres on go90.
- 2017 — Transformers: Dark of the Moon is released in 4K Ultra HD and Blu-ray to home media.
- 2018 — Star Trek vs. Transformers #3 and The IDW Collection Phase Two: Volume 8 are released by IDW Publishing.
- 2018 — "Transformers: Robots in Disguise: Combiner Force - "Freedom Fighters" is released on home media by Beyond Home Entertainment in Australia.
- 2019 — Ayrton Cardoso (Brazilian voice of Frenzy, Seaspray, Slag, Dynasty of Primes, Que and more) passes away.
- 2020 — The Transformers: Cyberverse episode "The Scientist" premieres in Germany.
- 2022 — Hasbro Pulse begins to ship out the HasLab Victory Saber.
- 2022 — The HasLab Victory/Legacy Decepticon Deathsaurus with Tigerchest and Eaglechest campaign reaches it's end goal of 14000 backers, unlocking the Living-Metal-Destroying Cannon and flail, 6 Fire Blast effects.
- 2022 — The Transformers: EarthSpark episode "Traditions" premieres in France, Germany, Hungary, and Indonesia.
- 2025 — The Transformers: EarthSpark finale specials "Hometown Heroes" and "Legacy of Hope" premiere on Paramount+.
- 2025 — Preorders for rhe Age of the Primes Sideways and Bruticus go up.
- 2025 — Streamer giant Netflix announces its plans to acquire Warner Bros.
- 1921 — Artist Charles Nicholas Wojtkoski is born.
- 1923 — Hassenfeld Brothers, the company that will one day turn into Hasbro, is founded.
- 1929 — Artist Frank Springer is born.
- 1932 — Jacques Ferrière (European French voice of Starscream, Grimlock, Hound, Sparkplug Witwicky and various others in the original cartoon) is born.
- 1942 — Nancy McKenzie (Latin-American Spanish voice of the Predacon computer) is born.
- 1943 — Anne Kerylen (European French voice of Elita One and one of the voices of Marissa Faireborn and Jessica Morgan) is born.
- 1953 — Klaus Lochthove (German voice of Porter C. Powell, Leadfoot, Drag Strip and Megatronus) is born.
- 1958 — Kim Jun (Korean voice of Smokescreen/Hoist and Billy) is born.
- 1961 — Letterer Robin Riggs is born.
- 1963 — Octavio Rojas (Mexican voice of Revenge of the Fallen Mindwipe, Prime Nemesis, Neil Armstrong and Groundpounder) is born.
- 1973 — Mirko Mazzanti (Italian voice of Hot Shot) is born.
- 1974 — Setsuji Satō (Japanese voice of Patrick Donnelly, Igor, Lucas Flannery, Bisk, Clampdown, Mohawk, Craig and several versions of Starscream) is born.
- 1975 — Sayaka Ohara (Japanese voice of Dot Malto) is born, and she can do anything cause she's Erza!
- 1985 — The Super Robot Lifeform Transformers episode "Two Convoys" premieres in Japan.
- 1988 — The Super-God Masterforce episode "Secret Orders! Destroy the Autobot Base!!" premieres in Japan.
- 1992 — The Headmasters episode "Scorponok's Weakness" airs in Malaysia.
- 2000 — The Car Robots episode "Black Convoy's Ambition" premieres in Japan.
- 2000 — The Beast Machines episodes "Mercenary Pursuits" and "Forbidden Fruit" premieres in Germany.
- 2003 — The Armada episode "Vacation" premieres in France.
- 2006 — Generations #10 is released by IDW Publishing.
- 2008 — The Transformers Animated episode "Lost and Found" premieres in Italy.
- 2008 — The Transformers Animated episode "A Bridge Too Close, Part I" premieres in Latin America.
- 2010 — Entertainment Tonight airs the first teaser trailer for Transformers: Dark of The Moon.
- 2011 — Transformers Prime: Darkness Rising is released on DVD in the US by Shout! Studios.
- 2011 — The Transformers: Prime episode Darkness Rising, Part 2 premieres in Poland.
- 2013 — "Transformers: Prime" by Eaglemoss/GE Fabbri concludes its run.
- 2014 — The Rescue Bots episode "Bugs in the System" premieres on Discovery Family.
- 2015 — The Robots in Disguise episode "Battlegrounds, Part 1" premieres in Japan.
- 2017 — Micronauts: Wrath of Karza TPB is released by IDW Publishing.
- 2019 — The Cyberverse episode "Wiped Out" premieres on the Cartoon Network site.
- 2022 — What Is the Story of Transformers? is released.
- 2022 — On this Transformers Tuesday, Hasbro reveals the Studio Series Bumblebee and Battletrap and preorders go up for them.
- 2022 — The Transformers: EarthSpark episode "Friends and Family" premieres in France, Germany, Hungary, and Indonesia.
- 2022 — Japanese musician Ichirō Mizuki, who sang the opening "Transformer Z no Theme" and ending "Ashita no Kimi e" songs from Enter the New Supreme Commander, Dai Atlas!, passes away due to lung cancer.
- 2022 — Dieter Brian Gerlach (German voice of Prime Ultra Magnus, Hardshell and Cyberverse Croaton) also dies at age 80.
- 2023 — Transformers #3 is released by Image Comics and Skybound Entertainment.
- 2023 — Paramount+ launches in Japan.
- 2024 — First day of Cybertron Con 2024, officially revealing much of the Age of the Primes toyline.
- 2025 — The My Nezha and Transformers cartoon premieres with three episodes on CCTV-14.
- 2025 — The Transformers: EarthSpark episode "Hometown Heroes" premieres in Switzerland on Nickelodeon.
- 2025 — The Cyberworld episode "Escape Velocity" premieres on YouTube.
- 1939 — Milt Jamin (voice of Generation 1 Blast Off and others) is born.
- 1940 — Arturo Mercado (Mexican voice of Colin Banes and Richard Nixon) is born.
- 1953 — Writer Buzz Dixon is born.
- 1954 — Pascal Renwick (French voice of Optimus Primal and Quickstrike) is born.
- 1954 — Lee Hyang-suk (Korean voice of Daniel Witwicky, Diver, Stampy and Koji Onishi) is born.
- 1962 — Philippe Résimont (French voice of Silas) is born.
- 1963 — Paul Dobson (voice of Tankor, Obsidian, Sideways, Rodimus, Landmine and more) is born.
- 1967 — Jari Salo (Finnish voice of Omega Supreme, Jetfire, Blitzwing, Henry Masterson/Headmaster, Ratchet and more) is born.
- 1974 — Lee Seong-wook (Singer of the Korean opening for Armada) is born.
- 1979 — Eric Bauza (voice of Drift, Headlock, Pseudo, Maven Danger, Skip Scobble, Prowl and more) is born, and he used the term loosely.
- 1981 — Titi Kamal (Indonesian voice of Tessa Yeager) is born.
- 1982 — Mysterious date inscribed on Universe Onslaught.
- 1985 — Carla Castañeda (Mexican voice of Nightbird) is born.
- 1995 — Michał Klawiter (Polish voice of Thrash, Cheetor and B-127) is born.
- 2003 — Quint and Hathaway of the Extra-Terrestrial Response Division try to sell off the Land Military Mini-Con Team in a private auction, but the Autobots stop them and save the three Mini-Cons. Sale of the Century!
- 2007 — The Transformers: The Movie is released on UMD in the UK by Metrodome.
- 2011 — The Transformers #31 is released by IDW Publishing.
- 2011 — The Transformers: Prime episode Darkness Rising, Part 3 premieres in Poland.
- 2012 — "Horrible TV" is first published by Eaglemoss/GE Fabbri in Russia.
- 2013 — The Transformers: Prime episodes "Minus One", "Persuasion", "Synthesis" and "Deadlock" premiere in Brazil.
- 2016 — More than Meets the Eye: Revolution is released by IDW Publishing.
- 2016 — "Transformers: Robots in Disguise — "Overloaded" is released on home media by Beyond Home Entertainment in Australia.
- 2018 — The Cyberverse episode "King of the Dinosaurs" airs on the Cartoon Network app and website.
- 2019 — The Cyberverse episode "Party Down" premieres in Germany and in the U.S..
- 2022 — Transformers: Best of Windblade is released by IDW Publishing.
- 2022 — The Transformers: EarthSpark episode "Decoy" premieres in France, Germany, Hungary and Indonesia.
- 2023 — Gabriel Ortiz (Mexican voice of Skid-Z) dies at age 44 from a heart attack.
- 2024 — The Transformers: EarthSpark episode "The Great Escape" premieres in Germany.
- 2025 — Episodes 4–6 of My Nezha and Transformers premiere on CCTV-14.
- 2025 — The EarthSpark episode "The Great Escape" premieres in Cantonese.
- 2025 — The Transformers: EarthSpark episode "Legacy of Hope" premieres in Switzerland on Nickelodeon.
- 2025 — The EarthSpark episode "Fire and Ice" premieres on Nicktoons in the U.S.
- 1954 — José Luis Miranda (Mexican voice of Onslaught, Ratchet, Sheriff Lock and more) is born.
- 1968 — Anja Rybiczka (German voice of Sierra) is born.
- 1973 — Doron Bell, Jr. (voice of Energon Cliffjumper) is born.
- 1978 — NASCAR driver Ryan Newman is born.
- 1978 — Andrea Bolognini (Italian voice of Soundwave in Dark of the Moon: The Game, Prime Cliffjumper, and Steeljaw) is born.
- 1984 — The Transformers episode "Fire in the Sky" premieres in the United States.
- 1987 — Mike Fédée (French voice of Hound and Astrotrain in the War for Cybertron Trilogy, and Reek in Rise of the Beasts) is born.
- 1991 — The Victory episode "Wake Up, Victory Leo" premieres in Malaysia.
- 1991 — Renan Alonso (Brazilian voice of Bumblebee) is born.
- 1996 — Alan García (Latin-American Spanish voice of Raf Esquivel) is born.
- 1999 — The Beast Wars Metals episode "You're Under Arrest, Meow!" airs in Japan.
- 1999 — Eduardo Drummond (Brazilian voice of Tripp Summers) is born.
- 2000 — The Beast Machines episode "Revelations Part I: Discovery" premieres in Germany.
- 2003 — Director Joe Morrison dies.
- 2003 — The Armada episode "Jungle" premieres in Germany.
- 2003 — The Armada episode "Cramp" premieres in the US.
- 2004 — Transformers Energon #30 is released by Dreamwave Productions.
- 2004 — The Transformers — Collection 5: Series 3.2 is released on DVD in Australia by Madman Entertainment.
- 2009 — The Animated episode "Decepticon Air" premieres in Latin America.
- 2010 — The Transformers #14 and The Transformers: Volume 2: International Incident TPB are released by IDW Publishing.
- 2010 — The teaser trailer for Transformers: Dark of The Moon is uploaded on Apple Trailers.
- 2011 — The Transformers: Prime episode Darkness Rising, Part 4 premieres in Poland.
- 2012 — Repeats of Transformers: Prime begin airing on the Saturday morning Vortexx programming block.
- 2012 — The Super Robot Lifeform Transformers: Prime episode "Infinite Transformation! Multiplying Enemies" peremieres in Japan.
- 2013 — Reinhard Brock (German voice of Jazz, Deliberata and more) dies at age 62.
- 2015 — The first day to get a free Ratbat Micron with 3000 yen of Transformers Adventure product at the TakaraTomy Mall online store.
- 2016 — The Robots in Disguise episodes "Mighty Big Trouble", "Mini-Con Madness" and "Worthy" premiere in France.
- 2018 — The Cyberverse episode "King of the Dinosaurs" airs on Cartoon Network in the US, while it and "The Extinction Event" air on Okto in Singapore.
- 2018 — The first two episodes of Rescue Bots Academy, "Recruits Part I" and "Recruits Part II", premiere on Discovery Family.
- 2018 — Special early screenings of the Bumblebee film take place in specific areas. Fans who attend are given free Tiny Turbo Changers toys, and short behind-the-scenes featurettes are shown before and after the film.
- 2018 — The Cyberverse episode "Siloed" and "King of the Dinosaurs" premieres in Italy.
- 2018 — The Cyberverse episodes "Shadowstriker" and "Maccadam's" premieres in Hungary.
- 2021 — Tread & Circuits #3 is released by IDW Publishing.
- 2022 — Paramount+ launches in Germany, Austria and Switzerland.
- 2022 — Transformers: Reactivate is announced at The Game Awards.
- 2022 — The Transformers: EarthSpark episode "Age of Evolution, Part 1" premieres in France, Germany, Hungary, and Indonesia.
- 2023 — Transformers: Rise of the Beasts TV premieres on French channel Canal+.
- 2024 — The Transformers: EarthSpark episode "No Soldier Left Behind" premieres in Germany.
- 2025 — Episodes 7–9 of My Nezha and Transformers premiere on CCTV-14.
- 1941 — Joachim Kerzel (German voice of Edmund Burton) is born.
- 1950 — Him Gregg Berger (voice of the original The Transformers cartoon Grimlock, Skyfire, and others) is born.
- 1967 — Dreamwave inker Ferdinand "Ferd" Poblete is born.
- 1971 — Dreamwave colorist Mike Majestic is born.
- 1973 — Soyeon (South Korean voice of Maggie Madsen and Elita) is born.
- 1974 — Sylvia Salustti (Brazilian voice of Jenny and Mikaela Banes) is born.
- 1985 — The Transformers episode "Aerial Assault" premieres in the US.
- 1986 — Felipe Drummond (Brazilian voice of Koji Onishi) is born.
- 1988 — Roman Molodiy (Ukranian voice of B-127) is born.
- 19?? — Jhos Lican (European French voice of Noah Díaz) is born.
- 1992 — IDW artist Beth McGuire-Smith is born.
- 1997 — The Beast Wars episode "Goodbye Rattle!?" premieres in Japan.
- 1998 — The Transformers—Autobot Edition LaserDisc set is released in Japan by Pioneer LDC.
- 1999 — Jean-Claude Michel (French voice of Unicron and the narrator in The Transformers: The Movie) passes away.
- 1999 — Beast Wars: Super Lifeform Transformers: Metals — The Movie is released on VHS by Toei Video.
- 2000 — The Beast Machines episode "Revelations Part III: Apocalypse" premieres in Germany.
- 2003 — Transformers Armada #18 and The Dark Ages issue 2 are released by Dreamwave Productions.
- 2003 — The Armada episode "Union" premieres in the US.
- 2003 — The Armada episode "Remorse" premieres in Germany.
- 2005 — The Galaxy Force episode "The Great Cybertron Gathering" premieres in Japan.
- 2008 — Maximum Dinobots #1 and More than Meets the Eye Vol 2 TPB are released by IDW Publishing.
- 2008 — Preorders close for Gentei! Gentei! Dirge and Thrust.
- 2011 — Transformers EZ Collection Chronicles Wave 2 (Convoy, Bluestreak, Hot Rodimus, Hound, Megatron, Prowl, Skywarp, and Starscream) is released in Japan.
- 2011 — The Transformers: Prime episode "Stronger, Faster" premieres in Italy.
- 2013 — Transformers: The Covenant of Primus is released by Amazon.
- 2014 — Angry Birds Transformers #2, The Transformers vol. 2 #36 and More than Meets the Eye Volume 6 TPB are released by IDW Publishing.
- 2015 — Transformers Prime: Beast Hunters — L'Intera Stagione 3 is released to home media in Italy by Primal Screen.
- 2017 — The Robots in Disguise episode "Breathing Room" premieres in Hungary.
- 2018 — Transformers Generations issue Outlier is first published by Hero-X.
- 2019 — The Cyberverse episode "Escape From Earth" premieres in Brazil.
- 2022 — The Transformers: EarthSpark episode "Traditions" premieres in Brazil.
- 2023 — The Transformers: EarthSpark episode "Wakwak Wheeljack!" premieres in Japan.
- 2024 — Preorders go up for the first wave of Transformers: Age of the Primes and the Sonic the Hedgehog × Transformers Wingtail & Blue Booster.
- 2025 — Transformers #27 is released by Image Comics and Skybound Entertainment.
- 2025 — Episodes 13–15 of My Nezha and Transformers premiere on CCTV-14.
- 2025 — The Wild King episode "The Second Form" premieres on the TakaraTomy YouTube channel.
- 2025 — Jim Ward (voice of Perceptor) dies at age 66.
- 1936 — Masaya Taki (voice of Tom) is born.
- 1943 — Buster Jones (voice of Blaster in the original The Transformers cartoon) is born.
- 1949 — Takurō Kitagawa (Japanese voice of Fight! Super Robot Lifeform Transformers [2010] cartoon Astrotrain, Grimlock, Warpath and many more) is born.
- 1955 — Andrzej Chudy (Polish voice of Boulder, Morshower and Megatron) is born.
- 1960 — Kunihiko Yasui (Japanese voice of Generation 1 Rollbar, Chromedome, Fortress Maximus, Skyfire and more) is born.
- 1963 — Tomoyuki Shimura (Japanese voice of Cybertron Landmine and Jorge Figueroa) is born.
- 1966 — Alain Eloy (French voice of Shockwave, Thundercracker and Hot Rod in Cyberverse) is born.
- 1966 — Illustrator Shinya Ohira is born.
- 1972 — Yann Sundberg (French voice of Cog in the War for Cybertron Trilogy) is born.
- 1972 — Seong-yong Ha (Korean voice of Prime Ratchet) is born.
- 1975 — Hōko Kuwashima (Japanese voice of Cybertron Jolt) is born.
- 1976 — Stany Mannaert (French voice of Denny Clay and Charlie Burns) is born.
- 1976 — McKeidy Lisita (Brazilian voice of Stone and King Arthur) is born.
- 1982 — David Jenner (Castillian Spanish voice of Miles Lancaster, Jerry Wang, Shane Dyson and B-127/Bumblebee) is born.
- 1984 — Vitor Coldibelli (Brazilian voice of Dead End) is born.
- 1986 — The Transformers: The Movie is released to UK theaters.
- 1986 — The Fight! Super Robot Lifeform Transformers 2010 episode "Conspiracy of the Quintessons" airs in Japan.
- 1989 — The Victory episode "Showdown! The Fortress vs the Victory Unification" premieres in Japan.
- 1998 — First day of BotCon Japan 1998 in Tokyo, Japan.
- 2000 — The Beast Machines episode "The Key" premieres in Germany.
- 2003 — The Legends of the Microns episode "連合 (そうりょくせん) - union" premieres in Japan.
- 2003 — The Armada series finale "Mortal Combat" premieres in the US.
- 2004 — The Beast Wars Returns episode "The Water of Life" premiers in Japan.
- 2006 — The 36th show in the Kiss Players radio drama series airs in Japan on the "Transformers Kiss Play: Transformers News Center" program.
- 2007 — Beast Wars: The Ascending #3, Best of UK: Dinobots #4 and Megatron Origin TPB are released by IDW Publishing.
- 2009 — The "Encore 19 Big Mission Vol 3" set (Frenzy, Rumble, Overkill & Laserbeak) is released in Japan.
- 2012 — The Transformers: Robots in Disguise #12, The Transformers: Spotlight: Orion Pax and G.I. Joe/Transformers Volume 2 are released by IDW Publishing.
- 2014 — Nestlé Arcade is released for PC, Mac, Android and iOS.
- 2015 — TakaraTomy releases Unite Warriors UW03 Guardian and UW04 Devastor.
- 2016 — The Robots in Disguise episodes "Decepticon Island (Part 1)" premieres in Hungary.
- 2017 — The Titans Return episode "Desperate Actions" premieres on go90.
- 2018 — Transformers: The Definitive G1 Collection Volume 25: Prime Directive is released by Hachette Partworks.
- 2019 — The first product in the Chinese-market Nezha: Transformers toyline is made available for sale, the "Nezha Power-Up Pack".
- 2020 — The Transformers: Cyberverse episode "The Alliance" premieres in Germany.
- 2022 — The final day for the HasLab Victory/Legacy Decepticon Deathsaurus with Tigerchest and Eaglechest campaign, which began on October 27. It ends with a whopping 27,442 backers, smashing past the initial 11,000 goal and the 17,000 "final" reward tier.
- 2022 — Wolfgang Ziffer (German voice of Egyptian guard) dies at the age of 81.
- 2023 — "May the Best Bot Win!" is released by Simon & Schuster.
- 2024 — Yolopark Announces the AMK Pro Rise Of The Beasts Scourge.
- 2024 — Márcia Gomes (Brazilian voice of Red Alert) dies at the age of 77 from Generalized infection.
- 2025 — Episodes 19–21 of My Nezha and Transformers premiere on CCTV-14.
- 1923 — Producer George Singer is born in Coney Island, New York.
- 1950 — Storyboard artist David Russell is born in Los Angeles.
- 1950 — Dark of the Moon actor Lindsey Ginter is born.
- 1956 — Patrick Descamps (French voice of Dreadwing, Unicron and Hardshell in Transformers: Prime) is born.
- 1957 — Steve Buscemi (voice of Daytrader and Starscream) is born in Brooklyn, New York.
- 1960 — Carlos Íñigo (Latin-American Spanish voice of Waspinator and Side Burn) is born.
- 1965 — Comic book artist Kyle Baker is born in Queens, New York.
- 1967 — Alexandre Marconatto (Brazilian voice of Optimus Prime) is born.
- 1969 — Hideo Ishikawa (Japanese voice of Cybertron Jetfire, Animated Jazz and more) is born.
- 1973 — Dláigelles Silva (Brazilian voice of Optimus Primal and Snarl) is born.
- 1975 — Úrsula Bezerra (Brazilian voice of Wheelie) is born.
- 1976 — Gerardo García (Mexican voice of Jazz, Fassbinder, John F. Kennedy, Santos and Barricade) is born.
- 1978 — Studio Gallop is founded.
- 1985 — The Super Robot Lifeform Transformers episode "Steel City" premieres in Japan.
- 1987 — Jacopo Calatroni (Italian voice of Graham Burns, Wedge, Swelter and Theorem) is born.
- 1988 — The Super-God Masterforce episode "Disaster! The Autobot Base Explodes" premieres in Japan.
- 1989 — Marie Braam (French voice of Whirl) is born.
- 1992 — The Headmasters episode "The Friendship of the Four Headmasters" airs in Malaysia.
- 1992 — Dawn M. Bennett (voice of Arcee and Flamewar in Transformers: Galactic Trials) is born.
- 1998 — Second and last day of BotCon Japan 1998 in Tokyo, Japan.
- 2000 — The Car Robots episode "Brave Maximus Arise!" premieres in Japan.
- 2000 — The Beast Machines episode "The Catalyst" premieres in Germany.
- 2002 — The Armada episode "Overmatch" premieres in the US.
- 2002 — Carlos Agosti (Latin American Spanish voice of Cyclonus, Omega Supreme and Perceptor) passes away at age 79.
- 2003 — The Armada episode "Reinforcement" premieres in France.
- 2006 — Transformers: The Animated Movie #3 is released in the US by IDW Publishing.
- 2008 — The Transformers Animated episode "Survival of the Fittest" premieres in Italy.
- 2008 — The Transformers Animated episode "A Bridge Too Close, Part II" premiere in Latin America.
- 2009 — Transformers makes its North American broadcast TV premiere on Canadian network CTV.
- 2010 — First day to preorder the e-HOBBY exclusive United "Autobot SET" (Hot Rod Blue Clear Version, Kup Damage Version, Scrapheap) and "Decepticon SET" ("Purple Clear Version" set of Galvatron, Cyclonus with Nightstick, and Scourge).
- 2011 — The Transformers 3-Movie Set is released on Blu-Ray.
- 2011 — The Transformers: Prime episode "Scrapheap" premieres in Poland.
- 2012 — The Transformers Legends mobile game is released.
- 2013 — Transformers Cloud: Spacetime World: Guardians of Time Chapter 1: Part 3 is first published.
- 2014 — The Rescue Bots episodes "Switcheroo" and "The Riders of Midwinter" premiere on Discovery Family.
- 2016 — The Robots in Disguise episodes "Decepticon Island (Part 2)" premieres in Hungary.
- 2017 — The Hasbro Heroes Sourcebook TPB is released by IDW Publishing.
- 2017 — Transformers: The Definitive G1 Collection: Volume 52: The Death of Optimus Prime is released by Hachette Partworks.
- 2018 — The Bumblebee movie is released in Russia.
- 2019 — "War for Cybertron Holiday Dinner" and "BotBots Mischief!" are uploaded to YouTube.
- 2019 — The Cyberverse episode "Ghost Town" premieres on the Cartoon Network site.
- 2022 — HasLab reveals a surprise "reward" tier following the end of the ultra-successful Deathsaurus campaign: new-mold toys of Boater and Pīpō.
- 2025 — The Cyberworld episode "Torn Apart" premieres on YouTube.
- 2025 — Episodes 22–24 of My Nezha and Transformers premiere on CCTV-14.
- 1916 — Director John Freeman (who is NOT Gordon Freeman's brother) is born in Spokane, Washington.
- 1954 — James Horan (Voice of Wheeljack on Transformers: Prime) is born to sell 5 Hour Energon.
- 1955 — Stefan Gossler (German voice of Galvatronus) is born.
- 1970 — Guilene Conte (Brazilian voice of Moonracer and Su Yueming) is born.
- 1984 — Screenwriter Eric Pearson is born.
- 1984 — Christopher Kohn (German voice of Jazz) is born.
- 2000 — The Beast Machines episode "End of the Line" premieres in Germany.
- 2001 — The 2001 Robots in Disguise cartoon episode "Lessons of the Past" premieres in the US.
- 2004 — Storyboard artist Jim Fletcher dies.
- 2009 — TFWiki creates its 10,000th article: Ming-Li.
- 2011 — The Transformers: The IDW Collection Volume Five is released by IDW Publishing.
- 2011 — "A Gift For Megatron" is uploaded to the Transformers YouTube page.
- 2011 — The Transformers: Prime episode "Con Job" premieres in Poland.
- 2012 — TakaraTomy releases the Asian market exclusive Dark of the Moon Leader Megatron (Dark Energon Edition).
- 2013 — TakaraTomy releases Masterpiece MP-19 Smokescreen.
- 2015 — The Transformers Operation Omega mobile game is released.
- 2016 — Optimus Prime #1, Lost Light #1 and The Transformers: Till All Are One Vol. 1 TPB are released by IDW Publishing.
- 2018 — The Cyberverse episode "The Extinction Event" airs on the Cartoon Network app and website.
- 2019 — The Cyberverse episodes "Escape From Earth" and "Party Down" premieres in Japan.
- 2019 — The Cyberverse episode "Wiped Out" premiere in Germany and the U.S..
- 2021 — Henry Orenstein, the Hasbro employee who convinced the company to sell transforming Japanese robot toys, and who later invented the rubsign, passes away.
- 2022 — Shattered Glass II #5, the final Transformers comic book from IDW Publishing, is released.
- 2022 — Paramount+ launches in Bosnia and Herzegovina, Bulgaria, Croatia, Kosovo, Montenegro, Serbia and Slovenia.
- 2024 — The Transformers: EarthSpark episode "Fire and Ice" premieres in Germany.
- 2025 — Episodes 25 and 26 of My Nezha and Transformers premiere on CCTV-14.
- 2025 — The EarthSpark episode "No Soldier Left Behind" premieres in Cantonese.
- 2025 — The EarthSpark episode "The Truth Is Out There" premieres on Nicktoons in the U.S.
- 1951 — David Bischoff (author of "Lonesome Diesel") is born.
- 1956 — Antonio Angrisano (Italian voice of Demolishor) is born.
- 1957 — Yūichi Nagashima (Japanese voice of Tarantulas, Noble, Alpha Quintesson, Seymour Simmons, Blitzwing, Sky-Byte, Stratosphere and more) is born.
- 1957 — Sound editor Nicholas James is born.
- 1962 — Daiki Nakamura (Japanese voice of Beast Wars Rhinox, Beast Machines Tankor and Animated Mixmaster) is born-dana.
- 1965 — Torsten Münchow (German voice of Ironhide in the G2 episode "Auto Berserk") is born.
- 1968 — Toshitaka Shimizu (Japanese voice of Sentinel Minor) is born.
- 1971 — Miwa Matsumoto (voice of Scylla and Licca Kayama) is born.
- 1975 — Haruna Ikezawa (Japanese voice of Transmutate) is born.
- 1978 — Ryan Andes (voice of Cyberverse Grimlock, Shockwave, Iaconus and Doublecrosser) is born.
- 1981 — Victoria Summer (actress in Transformers: Age of Extinction) is born.
- 1984 — The Transformers episode "Heavy Metal War" premieres in the US.
- 1985 — Luis Enrique Poján (Latin American voice of Cybertron Jetfire) is born.
- 1989 — Tomo Muranaka (Japanese voice of Russell Clay) is born.
- 1991 — The Victory episode "The Indestructible Combination" premieres in Malaysia.
- 1997 — Ayano Konishi of the Tokyo Girls' Style idol group is born.
- 1999 — The Beast Wars Metals episode "I Do Love You!" airs in Japan.
- 2000 — The Beast Machines episode "Fallout" premieres in Germany.
- 2003 — War Within: The Dark Ages #3 is released in the US by Dreamwave Productions.
- 2003 — The Armada episode "Puppet" premieres in Germany.
- 2004 — Super Link—Volume 008 is released on DVD in Japan by Interchannel.
- 2006 — Transformers is released on DVD in Germany by Great Movies.
- 2008 — The Henkei! Henkei! Transformers manga chapter "Kingdom of Giants" is serialized in Japan in Comic BunBun's January 2009 issue.
- 2009 — The Transformers Animated episode "This Is Why I Hate Machines" premieres in Latin America.
- 2010 — Zion Broadnax (voice of Mo Malto) is born.
- 2011 — The Transformers: Prime episode "Convoy" premieres in Poland.
- 2012 — TakaraTomy releases Prime AM-27 Ultra Magnus, AM-28 Leo Prime and AM-29 Shockwave, Masterpiece Alert, and Cap Bots Captimus Prime and Capticon.
- 2012 — The Super Robot Lifeform Transformers: Prime episode "Thunder God Transformation! Rebellion of the Battleship Nemesis" premieres in Japan.
- 2013 — Denis Gravereaux (Canadian French voice of Bruce Brazos) passes away, aged 52.
- 2016 — Hero-X releases Transformers Generations 2017 Vol. 1.
- 2016 — The Robots in Disguise (2015) episode "Strongarm's Big Score" premieres in Hungary.
- 2018 — The Cyberverse episode "The Extinction Event" airs on Cartoon Network in the US, while "Awaken Sleeping Giants" and "Eruption" air on Okto in Singapore.
- 2018 — The Cyberverse episode ""The Extinction Event" also premieres in Italy.
- 2018 — The Cyberverse episodes "Shadowstriker" and "Maccadam's" premieres in Germany.
- 2018 — TakaraTomy releases Movie Masterpiece MPM-6 Ironhide.
- 2018 — Transformers: Revenge of the Fallen premieres on TV in the United Arab Emirates.
- 2019 — Lu Jianyi (Chinese voice of Optimus Prime, Megatron, Harold Attinger and more) dies at age 62.
- 2021 — Transformers #38 is released by IDW Publishing.
- 2021 — Jussi Wahlgren (Swedish voice of Bulkhead, Shockwave and Alpha Trion) passes away, aged 69.
- 2021 — The Cyberverse episode "The Immobilizers" premieres in Germany.
- 2022 — Transformers Go! Go! #18 is published.
- 2023 — The expanded edition vinyl of the Rise of the Beasts score is released through Music On Vinyl & Milan Records.
- 2023 — Transformers Go! Go! #32 is published.
- 2024 — The Transformers: EarthSpark episode "The Truth Is Out There" premieres in Germany.
- 1941 — Journalist Lesley Stahl is born.
- 1953 — Rebecca Forstadt (Stand in voice for T-AI in A Test of Metal) is born.
- 1954 — Arturo Casanova (Latin American Spanish voice of Sentinel Prime in Dark of the Moon) is born.
- 1955 — Angelo Maggi (Italian dub voice of Seymour Simmons in the Movieverse) is born.
- 1956 — Vesa Hämes (Finnish voice of Hot Shot, Demolishor, Six Shot, Quickmix and Mike Franklin) is born.
- 1962 — Jin Horikawa (voice of Onslaught, Pounce, Fracas and others in the Japanese dub of "The Rebirth") is born.
- 1966 — Armando Coria (Latin-American Spanish voice of Graham, Roadbuster, Saberhorn, Galvatronus, Jon Schloder and Wheeljack in the War for Cybertron Trilogy) is born.
- 1968 — Actress Nathalie Stas (French voice of Blackarachnia in Beast Machines) is born.
- 1971 — Mônica Marianno (Brazilian voice of Acid Storm) is born.
- 1972 — Peter Pihlström (Finnish voice of Billy) is born.
- 1974 — Beomki Hong (Korean voice of Scattorshot, Evac, Brakedown and Mike Franklin) is born.
- 1980 — Boris Cabrera (actor of Marco) is born.
- 1985 — The Transformers episode "Masquerade" premieres in the US.
- 1989 — The Transformers: The Movie is released on Laserdisc in Japan by Sohbi Kikaku.
- 1989 — Taras Tsymbalyuk (Ukranian voice of Darkwing) is born.
- 1990 — The Super-God Masterforce episode "Battle for the Moon" premieres in Malaysia.
- 1992 — Designer Leandro Martinez dies in LA.
- 1998 — The Beast Wars II episode "Fly Out! Planet Gaia" premieres in Japan.
- 1999 — Beast Wars: Metals — We're Back! and Convoy Reborn are released on VHS in Japan by Pioneer LDC.
- 2000 — The Beast Machines episode "Savage Noble" premieres in Germany.
- 2003 — The Armada episode "Uprising" premieres in Germany.
- 2005 — Galaxy Force — Vol. 07 is released on DVD in Japan by Victor Entertainment.
- 2008 — Many children can expect their Christmas to be ruined when they receive a gift of the Transformers: Energon Ultimate Collection DVD set, released today by Paramount Pictures.
- 2009 — Bumblebee #1, Transformers Animated Volume 12 and The Transformers #2 (U.S. west coast release only due to shipping delays) are released by IDW Publishing.
- 2009 — The Diamond-exclusive version of Timelines #4, "Wings of Honor", is released by Fun Publications.
- 2011 — The Transformers: Prime episode "Deus ex Machina" premieres in Poland.
- 2011 — The Transformers: Prime episode "Sick Mind" premieres in Germany.
- 2014 — The announcement is made of the imminent shutting down of Transformers Universe.
- 2015 — Robots in Disguise #5 is released by IDW Publishing.
- 2017 — The Robots in Disguise episode "Prepare for Departure" premieres in Hungary.
- 2017 — Michael Lucke (German voice of Megatron) dies at the age of 62.
- 2018 — The Cyberverse episodes "Awaken Sleeping Giants" and "Eruption" premiere in France.
- 2018 — The Cyberverse episodes "Sabotage" and "Teletraan-X" premieres in Germany.
- 2020 — Transformers Volume 3: All Fall Down HC is released by IDW Publishing.
- 2021 — Derrick J. Wyatt (art director and lead character designer for Transformers Animated) passes away.
- 2021 — Rajvinder Singh (German voice of Telephone operator) also dies at age 65.
- 2025 — Gil Gerard (voice of Megatronus) passes away at the age of 82 from an aggressive form of cancer.
- 1946 — Live-action film producer Steven Spielberg is born, followed by long slow shots of people looking.
- 1956 — T.K. Carter (voice of Rocksteady) is born.
- 1959 — Jean-Philippe Puymartin (voice director of the European French dubs of The Last Knight and Bumblebee) is born.
- 1959 — José Augusto Sendim (Brazilian voice of Ruination, Scalpel and Dino) is born.
- 1970 — Rapper DMX is born.
- 1973 — Shinobu Matsumoto (Japanese voice of JPL Engineer and Sawtooth) is born.
- 1978 — Actor Ravi Patel (Telephone operator in Transformers) is born.
- 1983 — Arnaud Laurent (French voice of Fomo) is born.
- 1985 — Krizia Bajos (voice of Agent Bala) is born.
- 1987 — The Headmasters episodes "Battle for Defense of the False Planet", "Find MegaZarak's Weak Spot!!" and "Head Formation of Friendship" premiere in Japan.
- 1989 — Jim Gosa (voice of Abominus) dies at the age of 58.
- 1999 — The Beast Machines episode "End of the Line" premieres in the US.
- 1999 — The Beast Wars - BEAST WARS TRANSFORMER SONGS BEST soundtrack album is released in Japan by Columbia Music Entertainment.
- 2000 — The Beast Machines episode "In Darkest Knight" premieres in Germany.
- 2002 — Armada #5 is released by Dreamwave Productions.
- 2002 — Armada makes its Canadian television premiere on YTV airing the first 3 episodes First Encounter, Metamorphosis and Base.
- 2003 — DreamMix TV World Fighters is released for the PlayStation 2 and Nintendo GameCube.
- 2003 — The Armada episode "Drift" premieres in Germany.
- 2004 — Gernot Duda (German voice of Generation 1 Grimlock and Megatron plus some others he did for one or two episodes) dies at age 77.
- 2004 — The Beast Machines episode "The Moment of Truth" premieres in Japan.
- 2009 — Revenge of the Fallen is released on DVD & Blu-ray in Japan, with several stores featuring exclusive toy pack-ins.
- 2009 — The TakaraTomy Animated website goes live. Coincidentally, Sebastian Evans II, music composer for the Animated cartoon, posts the score for all three seasons on his website, sebastianevansmusic.com.
- 2010 — The Animated episode "Take Off! Optimus Prime" premieres in Japan.
- 2010 — The Japanese Autobot Alliance versions of Hailstorm, Highbrow, Tomahawk and Terradive are released.
- 2011 — The Prime episode "One Shall Rise, Part 2" premieres in Italy.
- 2011 — The Transformers: Prime episode "Operation: Breakdown" premieres in France.
- 2013 — Regeneration One #97, Robots in Disguise #24 (Dark Cybertron #5) and The Art of Prime are released by IDW Publishing.
- 2016 — The Robots in Disguise episode "Worthy" premieres in Japan, concluding the shows Japanese dub run.
- 2018 — The Cyberverse episode "Sabotage" premieres in Brazil.
- 2023 — Hasbro Pulse opens the HasLab Stock Vault for Premium Members for 24 hours, the remaining Transformers HasLabs sell out in just a few minutes.
- 2024 — G.I. Joe #2 is released by Image Comics and Skybound Entertainment.
- 2024 — Transformers One is released on home media in Japan.
- 1928 — Aldo César (Brazilian voice of Ram Horn) is born.
- 1936 — Marcos Miranda (Brazillian voice of Blitzwing, Bruticus, Dirge, Hoist, Kup, Swoop, Vector Sigma and more) is born.
- 1963 — Actor Iqbal Theba (UN Secretary General in Transformers: Dark of the Moon) is born.
- 1963 — Bernd Vollbrecht (German voice of Optimus Prime, Theodore Galloway and Affluous) is born.
- 1966 — Yumi Tōma (voice of Shūta Gō, Illumina, Clump, Emusa and Asuka) is born.
- 1967 — Fabrizio Manfredi (Italian voice of Beast Machines Rattrap) is born.
- 1967 — Cecilia Lundh (Swedish voice of Arcee and Override) is born.
- 1971 — Actor Carlos Moreno, Jr. (Manny in Transformers) is born.
- 1971 — Michael Yurchak (voice of Zorillor) is born.
- 1979 — Actor Ramon Rodriguez (Leo Spitz in Revenge of the Fallen) is born.
- 1979 — Choi Ji-hoon (Korean voice of Jazz) is born.
- 1985 — The Super Robot Lifeform Transformers episode "Capture the Negavator!" premieres in Japan.
- 1988 — The Super-God Masterforce episode "BlackZarak - Destroyer from Space" premieres in Japan.
- 1988 — Gabriel Ebling (Brazilian voice of Starscream) is born.
- 1992 — The Headmasters episode "The Mystery of the Pirate Ship" airs in Malaysia.
- 2000 — The Car Robots episode "Counterstrike! Devil Gigatron" premieres in Japan.
- 2000 — Transformers: Car Robots—Vol. 6 is released on DVD in Japan by Pony Canyon.
- 2000 — Transformers: Car Robots—Vol. 1 and Vol. 2 are released on VHS in Japan by Pony Canyon.
- 2000 — The Beast Machines episode "Home Soil" premieres in Germany.
- 2002 — The Armada episode "Gale" premieres in the US.
- 2002 — The Transformers Collection reissues of Smokescreen and Megatron are released in Japan.
- 2002 — Final day to pre-order the Figure Ō exclusive Tigertrack toy.
- 2003 — The Transformers: Victory DVD BOX 02 is released in Japan by Pioneer LDC.
- 2003 — The Armada episode "Decisive Battle" premieres in France.
- 2006 — Escalation issue 2 and "Spotlight: Sixshot" are released in the US by IDW Publishing.
- 2007 — The Headmasters series is released on DVD in New Zealand by Madman Entertainment.
- 2007 — Kazumi Tanaka (voice of Kirk, Suiken and Killbison) dies from pulmonary heart disease at the age of 56.
- 2008 — The Transformers Animated episode "Headmaster" premieres in Italy.
- 2010 — The Macrocosmic Seekers chapter "Hope within the Scrapheap" is e-mailed to e-HOBBY subscribers.
- 2011 — The Transformers: Prime episode "Predatory" premieres in Poland.
- 2011 — The Transformers: Prime episode "Scrapheap" premieres in Brazil and in Latin America.
- 2011 — The Transformers: Prime episode "Metal Attraction" premieres in France.
- 2013 — Transformers Cloud: Spacetime World: Guardians of Time Chapter 1: Part 4 is first published.
- 2014 — The Rescue Bots episode "Bot-Tastic Voyage" premieres on Discovery Family.
- 2016 — The Robots in Disguise episode "Mini-Con Madness" premieres in Hungary.
- 2017 — Optimus Prime #14 and the Till All Are One Annual are released by IDW Publishing.
- 2018 — The Bumblebee movie is released in Austria, Australia, Germany, Greece, Hungary, Israel, Italy, Kuwait, Latvia, Lebanon, Malayasia, Netherlands, New Zealand, Peru, Portugal, Saudi Arabia, Singapore, Slovakia, Thailand, Ukraine and the United Arab Emirates.
- 2019 — The Cyberverse episode "Perfect Storm" is released on the Cartoon Network app.
- 2020 — César Árias (Mexican voice of Inferno, Archibald Witwicky and Akram) dies at age 79.
- 2022 — After having disappeared earlier this July, voice actor Miguel Ángel Ghigliazza was pronouced dead.
- 2023 — Neo Player One reveals the Sofvi Beast Wars Powered Convoy Second Edtion (Primal Prime Deco) vinyl figure.
- 2025 — Age of the Primes Deluxe Wave 5 is officially revealed by Hasbro China at an offline event.
- 1939 — Composer Franco Micalizzi is born.
- 1944 — Paulo Flores (Brazillian voice of Wildrider, Rumble, Devastator, Quintesson Judge and more) is born.
- 1946 — André Filho (Brazillain voice of Windcharger, Greene, Rocksteady and more) is born.
- 1953 — Designer Andy Couzens is born.
- 1955 — Werner Crock von Krumbiegel (German voice of G2 Hot Rod/Rodimus and Powerglide) is born.
- 1959 — Storyboard artist Lindsay Dawson is born in California.
- 1965 — Guillermo Martínez (Latin-American Spanish voice of Demolishor) is born.
- 1972 — Sa Seong-woong (Korean voice of Railspike, Wedge, Landfill, Ironhide, Skid-Z and Movor) is born.
- 1977 — Lyricist Hitomi Mieno is born.
- 1980 — Melanie Isakowitz (German voice of two Windblades) is born.
- 1997 — Beast Wars: Super Lifeform Transformers — Enter the Super Lifeform Transformers and Cheetus' Crisis are released on VHS in Japan by Pioneer LDC.
- 2000 — The Beast Machines episode "Sparkwar Pt. I: The Strike" premieres in Germany.
- 2011 — The Transformers: The Death of Optimus Prime (formerly issue #125) is released by IDW Publishing.
- 2011 — The Transformers: Prime episode "Sick Mind" premieres in Poland.
- 2011 — The Transformers: Prime episode "Rock Bottom" premieres in France.
- 2011 — Pauli Virta (Finnish voice of Starscream, Smokescreen, Bulkhead, Skyblast, Lugnutz, Mike Franklin and Snarl) passes away at age 66.
- 2012 — "Cell" is first published by Eaglemoss/GE Fabbri in Russia.
- 2012 — TakaraTomy releases the Asian market exclusive Classics Seeker Set Ace (Starscream, Skywarp and Thundercracker).
- 2012 —
The end of the world. Bummers.
Actual apocalypse may vary.
- 1939 — Romano Malaspina (Italian voice of Megatron) is born.
- 1946 — Alfredo Martins (Brazilian voice of Hot Shot, Starscream, Menasor, Optimus Prime and voice director of Armada) is born.
- 1965 — Laurent Pasquier (French voice of Optimus Prime in Transformers: Cyberworld) is born.
- 1968 — Producer Adam Beechen is born.
- 1975 — Catherine Proulx-Lemay (Canadian French voice of Mikaela Banes) is born.
- 1975 — Salvador Reyes (Mexican voice of Barricade, Sideswipe, Dino/Mirage, Bulkhead, Boulder, Astrotrain and more) is born.
- 1983 — Yui Kano (voice of Shaoshao Li, Glit and Zangetsu) is born.
- 1984 — The Transformers episode "Fire on the Mountain" premieres in the US.
- 1987 — Samuel Harjanne (Finnish voice of Rad White, Coby Hansen and Red Alert) is born.
- 1989 — Voice actress Corina Boettger is born.
- 1991 — The Victory episode "Meekon Saves the School" premieres in Malaysia.
- 1998 — The Transformers DVD BOX 1 is released in Japan by Pioneer LDC.
- 1998 — The Transformers: The Movie is released on Laserdisc in Japan by Pioneer LDC.
- 1998 — Beast Wars II - ACT. 9 is released on VHS in Japan by Pioneer LDC.
- 1999 — Beast Wars Neo - ACT. 11 and ACT. 12 are released on VHS in Japan by Pioneer LDC.
- 1999 — The Beast Wars Metals episode "Lo～ng Long Ago" airs in Japan.
- 2000 — The Beast Machines episode "Sparkwar Pt. II: The Search" premieres in Germany.
- 2000 — Sara Gómez (Mexican voice of Izabella) is born.
- 2004 — Beast Wars Returns - Volume 2 is released in Japan by Geneon Entertainment.
- 2009 — The Transformers: Animated episode "Endgame, Part I" premieres in Latin America.
- 2011 — The Transformers: Prime episode "Out of His Head" premieres in Poland.
- 2011 — The Transformers: Prime episode "Partners" premieres in France.
- 2012 — The Super Robot Lifeform Transformers: Prime episode "Recovery Transformation! Battle in the Metropolis Underground" premieres in Japan.
- 2013 — Mauricio Gutiérrez (Mexican voice of Kris Díaz) is born.
- 2017 — TakaraTomy releases Masterpiece MP-39 Sunstreaker.
- 2018 — TakaraTomy releases Encore Unicron (Micron Aggregate Color).
- 2018 — The Cyberverse episode "Awaken Sleeping Giants" airs on Cartoon Network in the US.
- 2018 — The Bumblebee movie has its Belgian premiere in Brussells.
- 2021 — Shattered Glass #5 is released by IDW Publishing.
- 2021 — The Transformers: Cyberverse special "The Immobilizers" premieres on Netflix.
- 2023 — Paramount+ launches in Belgium.
- 2024 — The Transformers: EarthSpark episode "Judgment Day, Part 2" premieres in Germany.
- Every year — Christmas!
- 1920 — Comic letterer Joe Rosen is born.
- 1948 — Bernard Alane (European French voice of Joshua Joyce, Merlin and Aftermath) is born.
- 1948 — Music producer and songwriter Spencer Proffer is born.
- 1953 — Uwe Jellinek (German voice of Lugnut and more) is born.
- 1960 — Ron Bottitta (voice of Roadbuster) is born.
- 1966 — Artur Święs (Polish voice of Henry Masterson/Headmaster) is born.
- 1969 — Jaron Löwenberg (German voice of Mr. Hosney, Soundwave, Wasp, Tutor Bot, Dutch, Ron, Spud Muffin and War for Cybertron Trilogy Ratchet) is born.
- 1985 — The Transformers episode "War Dawn" premieres in the US.
- 1985 — Shūichi Nishitani (Japanese voice of Seymour Simmons in Bumblebee) is born.
- 1987 — The Headmasters episode "Mystery of the Space Pirate Ship" premieres in Japan.
- 2000 — The Beast Machines episode "Endgame Pt. I: The Downward Spiral" premieres in Germany.
- 2001 — João Baptista de Pereira Filho (Brazilian voice of Cicadacon) dies at the age of 53 from cardiac arrest.
- 2003 — Takara releases the first wave of the Super Link toyline, too many products to list here.
- 2003 — Legends of the Microns - Volume 9 is released on DVD in Japan by Columbia Music Entertainment, coming with the "Linkage Part 9" mini-comic and exclusive Bilge toy.
- 2003 — Comic artist Art Wetherell dies.
- 2004 — The Beast Wars Returns episode "The Monster's Anguish" premieres in Japan.
- 2005 — The 15 Go! Go! chapter "Galvatron Volume 2" is published in the February 2006 issue of Dengeki Hobby.
- 2006 — The 15 Go! Go! chapter "Sparkbots Volume 1" is published in the February 2007 issue of Dengeki Hobby.
- 2006 — James Brown, "The Godfather of Soul" dies at age 73.
- 2010 — Masterpiece MPM-2 Bumblebee is released in Japan. United kicks off in Japan with the release of Optimus Prime (both Cybertron Mode and Earth modes), Megatron (Cybertron Mode and Earth modes), Bumblebee (Cybertron Mode and Earth modes), Cliffjumper Cybertron Mode, Soundwave Cybertron Mode, Drift and Straxus.
- 2010 — The Animated episode "The Final Decisive Battle! Suppress Megatron" premieres in Japan.
- 2010 — The Cool Episode Final is serialized in Japan by Kerokero Ace in their February 2011 issue.
- 2018 — The Bumblebee movie is released in Brazil, Botswana, South Korea, and Sweden.
- 2018 — The Cyberverse episode "Teletraan-X" airs in Brazil.
- 2019 — Transformers: The Definitive G1 Collection Volume 66: Speak, Memory is released by Hachette Publishing.
- 2021 — TakaraTomy releases Masterpiece MP-52+ Skywarp as a TakaraTomy Mall exclusive.
- 2022 — At the NFL Nickmas Games, Optimus Prime and Optimus Primal make appearances during the game to promote Transformers: Rise of the Beasts.
- 2024 — Super7 ReAction Wrecking Crew Devastator is released.
- ???? — Alberto Bernal (Mexican voice of Bumblebee) is born.
- ???? — Taisuke Nakano (Japanese voice of War for Cybertron Trilogy Rhinox) is born.
- 1927 — Gerd Wiedenhofen (German voice actor for Astrotrain, Galvatron, Sparkplug Witwicky and many many others) is born.
- 1933 — The Nissan Motor Corporation, creator of Alternity Megatron, Optimus Prime, Ultra Magnus and others' alt modes, is formed in Tokyo, Japan.
- 1941 — Voice actor Blain Fairman is born.
- 1947 — TakaraTomy designer Kunio Okawara is born.
- 1951 — Ginzō Matsuo (voice of Commercial director) is born.
- 1955 — Marco Pagani (Italian voice of Scrapper, Silverbolt and Ego) is born.
- 1959 — Yoshikazu Hirano (Japanese voice of Dashtacker and occasionally Waver) is born.
- 1969 — Paulo Vignolo (Brazilian voice of Starscream and Swindle) is born.
- 1972 — Ricardo Tejedo (Latin American Spanish voice of Colan, Denny Clay, War for Cybertron Trilogy Impactor and Dark of the Moon Ratchet) is born.
- 1974 — Björn Schalla (German voice of Beast Machines Cheetor) is born.
- 1976 — Brad Swaile (voice of Kicker) is born, taking a potato chip and eating it.
- 1982 — Julien Fébreau (European French voice of the Announcer Bot in Transformers One) is born.
- 1983 — Omar Soto (voice of Bumblebee in the Spanish dub of Transformers) is born.
- 1985 — "The Night the Transformers Saved Christmas" published in Woman's Day Magazine.
- 1985 — The Transformers episode "Cosmic Rust" premieres in the US.
- 1986 — The Transformers 2010 episode "Starscream's Ghost" airs in Japan.
- 1986 — The Transformers: The Movie is released to Australian theaters.
- 2000 — The Beast Machines episode "Endgame Pt. II: When Legends Fall" premieres in Germany.
- 2002 — Armada #6 is released by Dreamwave Productions.
- 2002 — Takara releases the first wave of the Legends of the Microns toyline, which is way too many products to list here.
- 2003 — The Legends of the Microns episode "死闘 - Mortal Combat" premieres in Japan.
- 2003 — The Super Link toyline debuts in Japan. Multiple stores offer exclusive energon weapons as promotional gifts: the "Aqua Marine Energy Axe", "Black Hole Energy Axe", "Corona Flame Energy Spear", and "Royal Clear Energy Spear".
- 2004 — The Beast Wars Returns episode "The Awakening of the Monster" premieres in Japan.
- 2006 — The 38th show in the Kiss Players radio drama series airs in Japan on the "Transformers Kiss Play: Transformers News Center" program, bringing an end to the initial Kiss Players storyline.
- 2006 — The Victory cartoon is released on DVD in the UK by Metrodome.
- 2007 — Classic Transformers — Series One: Part One & Two are released on DVD in the UK by Metrodome.
- 2007 — The Animated episode "Transform and Roll Out" premieres in the US.
- 2009 — EZ Collection wave 2 (Optimus Prime Battle Damaged, Megatron Battle Damaged, Ironhide, Grindor, Skids, Sideways, Wheelie, & Soundwave) is released in Japan.
- 2010 — First day where Hasbro toy purchases are eligible for the "Supercharge Your Holidays" promotion.
- 2011 — Keroro Gunsō × Transformers is first published in Kerokero Ace #50.
- 2011 — The Transformers: Prime episode "Operation: Breakdown" premieres in Poland.
- 2011 — The Transformers: Prime episode "Stronger, Faster" premieres in France.
- 2012 — All Spark Episode 4 "Plans of the Emperor of Destruction" is serialized in Japan by Kerokero Ace in their February 2013 issue.
- 2014 — TakaraTomy releases Q-Transformers QT-01 Optimus Prime, QT-02 Bumblebee, QT-03 Lockdown, QT-04 Crosshairs, QT-05 Lambor, QT-06 Prowl, QT-07 Hot Rodimus, and QT-08 Bumble.
- 2015 — TakaraTomy releases Masterpiece MP-26 Road Rage, MP-21R Bumble Red Body, and MP-14C Clampdown.
- 2017 — The Titans Return episode "In Good Hands" premieres on go90.
- 2018 — Bumblebee is released in Belgium, Egypt, France, and Taiwan.
- 2018 — The Definitive G1 Collection Volume 53: Liars, A to D is released by Hachette Partworks.
- 2019 — TakaraTomy releases Masterpiece MP-47 Hound and Siege SG-38 Mirage and SG-39 Omega Supreme.
- 2020 — Go! Go! Where Is the Energon? is first released.
- 2020 — TakaraTomy releases Masterpiece MPM-11 Ratchet.
- 2020 — The Cyberverse episode "The End Of The Universe I" premieres in Germany.
- 2021 — Andrei Yaroslavtsev (Russian voice of Optimus Prime in the live-action film series) passes away at age 64.
- 2023 — Japanese clothing manufacturer Sugomono reveals the Transformers 40th Anniversary Jacket.
- 2024 — Void Rivals #15 is released by Image Comics and Skybound Entertainment.
- 2025 — TakaraTomy officially reveals the Wild King Dragknight Energy Beasts and preorders go up for them.
- 1955 — Marvel Comics artist Mark Bright is born.
- 1957 — Masashi Hironaka (voice of Doryu, Landcross, Wing and Wingwaver) is born.
- 1958 — Composer Takashi Tsushimi is born.
- 1971 — Christopher Swindle (voice of Ragebyte and Transformers: Devastation Wheeljack and Frenzy) is born.
- 1972 — Voice actor Alex Skuby is born.
- 1985 — The Fight! Super Robot Lifeform Transformers episode "The Micro Suicide Squad" premieres in Japan.
- 1985 — The Transformers episode "Kremzeek!" premieres in the US.
- 1992 — The Headmasters episode "The Death of Ultra Magnus" airs in Malaysia.
- 1996 — Garcia Neto (Brazillian voice of Ratchet, Unicron and more) passes away at age 86.
- 2000 — The Beast Machines series finale "Endgame Pt. III: Seeds of the Future" premieres in Germany.
- 2000 — The Car Robots episode "Final Battle! Fire Convoy" premieres in Japan.
- 2002 — The Armada episode "Credulous" premieres in the US.
- 2002 — The Legends of the Microns toyline debuts in Japan, including the all-Legends of the Microns Super Collection Figure Act 9.
- 2002 — The Transformers: Rage in Heaven TPB is released by Titan Books.
- 2003 — The Armada episode "Vow" premieres in France.
- 2006 — Hearts of Steel TPB is released by IDW Publishing.
- 2008 — Henkei! Henkei! volume 8 is first published.
- 2008 — TakaraTomy releases Henkei! Henkei! Transformers C-12 Cybertron Cheetus and C-13 Hound (w/ Jaguar).
- 2008 — The Transformers Animated episode "Nature Calls" premieres in Italy.
- 2009 — Transformers gets even nerdier when the Revenge of the Fallen Memorial Stampseat [sic] is released in Japan.
- 2011 — Fun Publications posts the online video "BotCon 2012: Figure Reveal!", which shows the first toy in the BotCon 2012 box set: "The Overlord" Gigatron.
- 2011 — The Transformers: Prime episode "Crisscross" premieres in Poland.
- 2011 — The Transformers: Prime episode "Con Job" premieres in Brazil and Latin America.
- 2011 — The Transformers: Prime episode "One Shall Fall" premieres in France.
- 2011 — United Stepper ships to those who ordered it.
- 2014 — TakaraTomy releases Masterpiece MP-22 Ultra Magnus in Japan.
- 2014 — The Rescue Bots episode "Quarry's Quarry" premieres on Discovery Family.
- 2017 — Serge Bourrier (French voice of Nergill, Doctor Fujiyama the Famous Scientist and the Mayor of Central City) passes away one day before his 86th birthday.
- 2017 — Scarlett's Strike Force #1, Lost Light #12, The Transformers: Autocracy Trilogy TPB, Transformers Drift: Origins & Empires TPB, and Transformers vs. G.I. Joe Quintessential Collection HC are released by IDW Publishing.
- 2017 — Transformers: The Definitive G1 Collection: Volume 44: All Hail Megatron, Part 2 is released by Hachette Partworks.
- 2018 — The Bumblebee movie is released in Argentina, Chile, Czech Republic and Hong Kong.
- 2019 — The Cyberverse episodes "Wiped Out" and "Ghost Town" premiere in Japan.
- 2019 — The Cyberverse episode "The Crossroads" is released on the Cartoon Network app.
- 2020 — Mieczyslaw Moranski (Polish voice of Energon Starscream and Strongarm) passes away at age 60.
- 2021 — Transformers Go! Go! #1 is first published.
- 2023 — Duke #1 is released by Image Comics and Skybound Entertainment.
- 2025 — TakaraTomy releases Age of the Primes AOTP-16 Micronus Prime, AOTP-17 Venin, AOTP-18 Skydive, AOTP-19 Fireflight, AOTP-20 Alpha Trion, and Missing Link C-09 Cybertron Hero Set (w/ Bumble and Cliff).
- 1931 — Serge Bourrier (French voice of Nergill, Doctor Fujiyama the Famous Scientist and the Mayor of Central City) is born.
- 1942 — Benoît Allemane (European French voice of Hound in the live-action film series) is born.
- 1944 — Júlio Chaves (Brazilian voice of Ultra Magnus, Mirage, Warpath, Menasor, Long Haul, Ratchet, Dropforge and more) is born.
- 1950 — Marvel Comics writer and editor Ralph Macchio is born.
- 1955 — Janice Chiang (letterer on The Transformers) is born.
- 1955 — Vladimiro Conti (Italian voice of Skids and numerous others in the G1 redub) is born.
- 1971 — Machiko Toyoshima (Japanese voice of Lucy Suzuki) is born.
- 1977 — José Leonardo (Brazilian voice of Miles Lancaster and Jazz) is born.
- 1977 — Javier Rodríguez Castellanos (Columbian voice of Optimus Prime, Bumblebee and more) is born.
- 1977 — Adriana Torres (Brazilian voice of Carly Spencer) is born.
- 1978 — Jang Min-hyeok (Korean voice of Sam Witwicky) is born.
- 1985 — Cover date for "Christmas Breaker!", published by Marvel Comics in the UK.
- 1995 — Isaac Maioli (Brazilian voice of Aftermath) is born.
- 1999 — Emiliano Venosa Gonzalez (Mexican voice of Rescue Bots Academy Hot Shot) is born.
- 2004 — Takara releases the Robotmasters RM-18 Road Rocket, RM-19 Double Face, RM-20 Delta Seeker vs. X-Gunner, RM-21 Burning Beast Convoy and the entire first wave of the Galaxy Force toyline launches in Japan.
- 2006 — The Kiss Players "Autorooper × Atari" figure set is released in Japan.
- 2010 — BIC Camera and Yodobashi Camera stores offer the exclusive United Fracas Targetmaster Micron, and Yamada Denki stores offer Haywire, each with the purchase of 3000 yen's worth of United product.
- 2011 — Big day for Japanese product! TakaraTomy releases the Prime: First Edition toys: Optimus Prime, Bulkhead, Bumblebee, Arcee, Cliffjumper, Starscream, Megatron, and the Vehicon. The "Arms Micron Present Campaign" begins, where the purchase of 3000 yen or more of Prime: First Edition toys nets you an exclusive figure: Peaceman is available at Toys"R"Us, while Blowpipe and Aimless are split between numerous others.
- 2011 — The Prime episode "Metal Attraction" premieres in Poland.
- 2011 — The Transformers: Prime episode "One Shall Rise, Part 1" premieres in France.
- 2012 — Prime — Vol. 10 & Vol. 11 are released to home video in Japan by Avex Trax.
- 2012 — TakaraTomy releases Generations TG-01 Optimus Prime and TG-02 Jazz.
- 2013 — TakaraTomy releases Generations TG-28 Megatron & Starscream and TG-29 Sandstorm.
- 2016 — "Coalescence" and "The Inexorable March" are released by Fun Publications.
- 2016 — G.I. Joe #1 and Till All Are One #6 are released by IDW Publishing.
- 2016 — TakaraTomy releases Legends LG-35 Super Ginrai, LG-36 Soundwave, LG-37 Jaguar & Bullhorn, LG-38 Condor & Apeface, and LG-39 Brainstorm (with Synapse).
- 2017 — TakaraTomy releases Legends LG-54 Bumble & Excelsuit Spike, LG-55 Targetmaster Slugslinger (with Caliburst), LG-56 Perceptor (with Amhorn), and LG-57 Octone (with Ghost Starscream), Masterpiece MP-39 Sunstreaker, and the reissue of Masterpiece MP-10B Black Convoy.
- 2018 — Bumblebee is released in Romania and Spain.
- 2018 — The Cyberverse episode "Eruption" airs on the Cartoon Network app and website.
- 2019 — The Cyberverse episode "Perfect Storm" premieres in Germany and the US.
- 2024 — TakaraTomy releases Bingo Sports Optimus Prime, Volvo VNR 300 Optimus Prime, MP-60 Ginrai, MPG-09 Super Ginrai, TL-79 Nucleous, TL-80 Vector Prime, SS-135 Steeljaw, SS-136 Skywarp, SS-137 Autobot Springer and SS GE-08 Decepticon Soldier.
- 2024 — Hasbro officially reveals the Age of the Primes Selects Trypticon (with Full-Tilt and Necro).
- 2024 — e-HOBBY releases the thirteenth wave of Transformers Character Card.
- 2025 — The EarthSpark episode "The Truth Is Out There" premieres in Cantonese.
- 1938 — Actor Jon Voight (John Keller in Transformers) is born.
- 1939 — Manfred Erdmann (German voice of Megatron and Galvatron) is born.
- 1943 — Jürgen Kluckert (German voice of Brigham, Unicron, Walter Cronkite, Cogman and Uncle Hank) is born.
- 1948 — Reiko Yamada (voice of Mayville) is born.
- 1960 — Actor Mike Fisher ("Football Coach" in Transformers) is born.
- 1960 — Stefano Mondini (Italian voice of Rodimus Prime, Ruination, Movor, Brian Jones, Sharp, Morshower and more) is born.
- 1960 — Stefan Godin (French voice of Wheeljack in the War for Cybertron Trilogy) is born.
- 1963 — Horacio Zapata (Argentinian voice of Rumble) is born.
- 1970 — Inker Rick Ketcham is born.
- 1971 — Sang-hyeon Eom (Korean voice of Jack Darby, Breakdown, Silas and others) is born.
- 1977 — Liu Haixia (Chinese voice of Botanica and Strika) is born.
- 1977 — Carlos Barragán (Mexican voice of Drift) is born.
- 1983 — Tobias Brecklinghaus (German voice of Bulkhead) is born.
- 1984 — The Transformers episode "A Plague of Insecticons" premieres in the US.
- 1985 — Heart of Darkness artist Ulises Fariñas is born in Elizabeth, New Jersey.
- 1991 — The Victory episode "Crisis at the Base" premieres in Malaysia.
- 1999 — The Beast Wars Metals episode "Gro〜w Bigger!" airs in Japan.
- 2009 — The series finale of Transformers: Animated, "Endgame, Part II" premieres in Latin America.
- 2010 — Transformers: Sector 7 #4 and The Transformers: Best of Starscream TPB are released by IDW Publishing.
- 2011 — The Transformers: Prime episode "Rock Bottom" premieres in Poland.
- 2011 — The Transformers: Prime episode "One Shall Rise, Part 2" premieres in France.
- 2012 — The Super Robot Lifeform Transformers: Prime episode "Freezing Transformation! Obtain the Invincible Body!" premieres in Japan.
- 2018 — The Cyberverse episode "Eruption" airs on Cartoon Network in the US.
- 2018 — TakaraTomy releases Masterpiece MP-36+ Megatron and Power of the Primes PP-41 Wreck-Gar and PP-42 Nemesis Prime.
- 2020 — TakaraTomy releases Masterpiece MP-51 Arcee.
- 2021 — Transformers/Back to the Future TPB (digital version) is released by IDW Publishing.
- 2021 — TakaraTomy releases Kingdom KD-16 Galvatron, War for Cybertron Trilogy WFC-19 Optimus Primal & Rattrap and Premium Finish PF WFC-03 Ultra Magnus and PF SS-03 Megatron, plus Kingdom KD EX-09 Autobot Ark and Generations Selects Ramjet are released as TakaraTomy Mall exclusives.
- 2021 — Erwin Grünspan (French voice of Beast Machines Optimus Primal, Aligned Optimus Prime, Cyberverse Optimus Prime and more) passes away at 48 from a heart attack.
- 2023 — Chinese mobile game Game For Peace begins a Collaboration with Transformers: Rise of the Beasts.
- ???? — Japanese voice actor Akihiro Mine is born.
- 1922 — Ljubiša Bačić (Starscream in the Serbian dub of the original cartoon) is born.
- 1947 — Gábor Forgács (Hungarian voice of Tidal Wave/Mirage, Scourge and Bill O'Reilly) is born.
- 1951 — Jang Kwang (Korean voice of Optimus Prime, Starscream, Blaster, Hook, Ron Witwicky, Archibald Witwicky and Theodore Galloway) is born.
- 1959 — Carlos del Campo (Mexican voice of Slapper) is born.
- 1969 — Actress Meredith Monroe (Julia Singer in Dark of the Moon) is born.
- 1972 — Selton Mello (Brazilian voice of Daniel Witwicky) is born.
- 1972 — Jussi Chydenius (Finnish voice of D-16/Megatron) is born.
- 1974 — Moisés Ivan Mora (Mexican voice of Mudflap, Cyber Missions Frenzy, Smokescreen, Vince and Blades) is born.
- 1978 — Tyrese Gibson's mother brings it by bringing him into the world.
- 1983 — Kaitlyn Robrock (voice of Cadet Rosato and Taylor) is born.
- 1990 — The Super-God Masterforce episode "And Now the Next Episode of the Whirling Tornado" premieres in Malaysia.
- 1998 — Stan Jones (voice of the original The Transformers cartoon Scourge, Zarak, and others) dies of heart disease at the age of 72.
- 1998 — The Beast Wars II episode "Revenge of the Space Pirates" premieres in Japan.
- 2003 — The Transformers — Collection 1: Series 1 is released on DVD in New Zealand by Madman Entertainment.
- 2005 — Kids' WB's AfterToons Show Block is canceled, moving Cybertron back to Cartoon Network.
- 2009 — Fun Publications reveals the second of 2010's fan club exclusive toys: Shattered Glass Cyclonus.
- 2011 — Fun Publications reveals the second toy in the BotCon 2012 box set: Shattered Glass Tracks.
- 2011 — The Transformers: Prime episode "Partners" premieres in Poland.
- 2011 — The Transformers: Prime episode "Shadowzone" premieres in Germany.
- 2011 — The Transformers: Prime episode "One Shall Rise, Part 3" premieres in France.
- 2015 — Sins of the Wreckers #2 is released by IDW Publishing.
- 2016 — Transformers: The Definitive G1 Collection Volume 6: Target: 2006 is released by Hachette Partworks.
- 2017 — TakaraTomy releases Legends LG-54 Bumble & Excel Suit Spike, LG-55 Targetmaster Slugslinger (with Caliburst), LG-56 Perceptor (with Ramhorn), and LG-57 Octone (with Ghost Starscream).
- 2017 — The Robots in Disguise episode "Something He Ate" premieres in Hungary.
- 2019 — Hasbro completes their acquisition of multimedia production company Entertainment One.
- 2020 — War for Cybertron Trilogy: Earthrise premieres on Netflix.
- 2020 — Transformers #26, Galaxies #12, and Escape #1 are released by IDW Publishing.
- 2021 — Transformers: Cyberverse special and series finale "The Perfect Decepticon" premieres in Germany.
- 2023 — TakaraTomy releases SS-114 Bumblebee and BWVS-05 Screaming Showdown Rattle VS Terrorsaurer.
